eustelen.

/juːˈstiːl/

Etymology: < eu- comb. form + stele n.

Botany.

A highly evolved stele, found in the stems of most dicotyledons, consisting of a central core of pith largely surrounded by discrete bundles of vascular tissue.

ΘΚΠ

the world > plants > part of plant > cell or aggregate tissue > [noun] > tissue > stele

meristele1894

stele1895

protostele1901

eustele1902

monostele1902

siphonostele1902

polystele1904

1902 G. Brebner in Ann. Bot. 16 519 The Dicotyledons are looked upon as the highest expression of plant life, and it therefore seems appropriate to apply the term eustele to their well-known type of vascular cylinder.

1944 Jrnl. Arnold Arboretum 25 455 If viewed in three dimensions, the primary vascular system is a series of leaf-traces, the lower extensions of which form a eustele whose bundles are arranged cylindrically.

1961 A. J. Eames Morphol. Angiosperms i. 24 The eustele, with reduced vascular tissue, is perhaps the advanced stelar form.

1987 H. C. Bold et al. Morphol. Plants & Fungi (ed. 5) xv. 376/2 Although the xylem and phloem are present as discrete strands (eustele) in the internodes of Equisetum, serial sections through the nodes reveal that they join there to form a short siphonostele.

Derivatives

euˈstelic adj.

ΘΚΠ

the world > plants > part of plant > cell or aggregate tissue > [adjective] > of or having stele

polystelic1891

protostelic1899

siphonostelic1899

stelar1901

meristelic1902

eustelic1944

1944 Jrnl. Arnold Arboretum 25 455 It is questionable..whether foliar gaps, comparable to those found in siphonostelic ferns, are recognizably present in a primary vascular cylinder of the eustelic type.

1965 K. Esau Plant Anat. (ed. 2) xv. 373 The interfascicular regions and later the leaf gaps are commonly discontinued as such..and the eustelic condition ceases to be recognizable.

1988 Taxon 37 381 The character correlation of eustelic or sympodial primary vascular system of stem, [etc.]..indicate a relationship..with the progymnosperm-seed plant line.

This entry has not yet been fully updated (first published 1993; most recently modified version published online June 2018).

单词	eustele
释义	eustelen. /juːˈstiːl/ Etymology: < eu- comb. form + stele n. Botany. A highly evolved stele, found in the stems of most dicotyledons, consisting of a central core of pith largely surrounded by discrete bundles of vascular tissue. ΘΚΠ the world > plants > part of plant > cell or aggregate tissue > [noun] > tissue > stele meristele1894 stele1895 protostele1901 eustele1902 monostele1902 siphonostele1902 polystele1904 1902 G. Brebner in Ann. Bot. 16 519 The Dicotyledons are looked upon as the highest expression of plant life, and it therefore seems appropriate to apply the term eustele to their well-known type of vascular cylinder. 1944 Jrnl. Arnold Arboretum 25 455 If viewed in three dimensions, the primary vascular system is a series of leaf-traces, the lower extensions of which form a eustele whose bundles are arranged cylindrically. 1961 A. J. Eames Morphol. Angiosperms i. 24 The eustele, with reduced vascular tissue, is perhaps the advanced stelar form. 1987 H. C. Bold et al. Morphol. Plants & Fungi (ed. 5) xv. 376/2 Although the xylem and phloem are present as discrete strands (eustele) in the internodes of Equisetum, serial sections through the nodes reveal that they join there to form a short siphonostele. Derivatives euˈstelic adj. ΘΚΠ the world > plants > part of plant > cell or aggregate tissue > [adjective] > of or having stele polystelic1891 protostelic1899 siphonostelic1899 stelar1901 meristelic1902 eustelic1944 1944 Jrnl. Arnold Arboretum 25 455 It is questionable..whether foliar gaps, comparable to those found in siphonostelic ferns, are recognizably present in a primary vascular cylinder of the eustelic type. 1965 K. Esau Plant Anat. (ed. 2) xv. 373 The interfascicular regions and later the leaf gaps are commonly discontinued as such..and the eustelic condition ceases to be recognizable. 1988 Taxon 37 381 The character correlation of eustelic or sympodial primary vascular system of stem, [etc.]..indicate a relationship..with the progymnosperm-seed plant line. This entry has not yet been fully updated (first published 1993; most recently modified version published online June 2018). < n.1902
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